确实，美国有时发生严重的失业问题，有时也出现缺乏劳动力的现象。
It is true that at times the U. s. A. has experienced periods of acute unemployment as well as labor shortages.
但由于农村劳动力文化素质不高、技能缺乏、观念落后等，严重制约着其合理有序转移。
But several factors restrict the realization of reasonable and orderly migrating of rural labor such as low cultural quality and lack of skills and conception lag behind and etc.
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